Comprehensive analysis of the simplest curvaton model

Understand

We carry out a comprehensive analysis of the simplest curvaton model, which is based on two non-interacting massive fields.

• Our analysis encompasses cases where the inflaton and curvaton both contribute to observable perturbations, and where the curvaton itself drives a second period of inflation.
• We consider both power spectrum and non-Gaussianity observables, and focus on presenting constraints in model parameter space.
• The fully curvaton-dominated regime is in some tension with observational data, while an admixture of inflaton-generated perturbations improves the fit.